update readme, add dockman script, require env vars when building, move npm install to image build process

Dockerfile

@@ -3,20 +3,29 @@ FROM reactnativecommunity/react-native-android
 
 # config and update
 ENV DEBIAN_FRONTEND noninteractive
+ENV DOCKER=true
 WORKDIR /home
 RUN apt-get update
 RUN mkdir /var/log/app
 ARG SSH_KEY
+ARG NODE_VERSION
+ARG GH_TOKEN
+ARG NPM_TOKEN
+ARG RN_PROJECT_FOLDER_NAME
 
 # set up NVM and use v16 LTS
 RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.38.0/install.sh | bash
 ENV NVM_DIR /root/.nvm
-ENV NODE_VERSION 16.20.1
 RUN . "$NVM_DIR/nvm.sh" && nvm install $NODE_VERSION && nvm alias default $NODE_VERSION && nvm use default
 ENV NODE_PATH $NVM_DIR/versions/node/v$NODE_VERSION/lib/node_modules
 ENV PATH $NVM_DIR/versions/node/v$NODE_VERSION/bin:$PATH
 RUN npm install -g react-native-cli
 
+# add gh/npm tokens and install project dependencies
+RUN echo \"//github.com/:_authToken=$GH_TOKEN\" > /home/app/.npmrc
+RUN echo \"//registry.npmjs.org/:_authToken=$NPM_TOKEN\" >> /home/app/.npmrc
+RUN cd /home/$RN_PROJECT_FOLDER_NAME && npm install
+
 # Install SSH server
 RUN apt-get -y install openssh-server
 COPY sshd_config /etc/ssh/sshd_config
@@ -31,4 +40,4 @@ COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 
-ENTRYPOINT ["/entrypoint.sh"]
+CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/conf.d/supervisord.conf"]